39904144 has 20 divisors (see below), whose sum is σ = 88359424. Its totient is φ = 17101728.

The previous prime is 39904079. The next prime is 39904147. The reversal of 39904144 is 44140993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39904147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178032 + ... + 178255.

Almost surely, 2^39904144 is an apocalyptic number.

It is an amenable number.

39904144 is an abundant number, since it is smaller than the sum of its proper divisors (48455280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39904144 is a wasteful number, since it uses less digits than its factorization.

39904144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356302 (or 356296 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 39904144 is about 6316.9726926749. The cubic root of 39904144 is about 341.7217850663.

The spelling of 39904144 in words is "thirty-nine million, nine hundred four thousand, one hundred forty-four".